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4145 Aluminum vs. ASTM A228 Music Wire

4145 aluminum belongs to the aluminum alloys classification, while ASTM A228 music wire belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 4145 aluminum and the bottom bar is ASTM A228 music wire.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 2.2
12
Fatigue Strength, MPa 48
1280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
72
Shear Strength, MPa 69
1470
Tensile Strength: Ultimate (UTS), MPa 120
2450
Tensile Strength: Yield (Proof), MPa 68
2050

Thermal Properties

Latent Heat of Fusion, J/g 540
250
Maximum Temperature: Mechanical, °C 160
400
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 100
49
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 84
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
1.8
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.4
Embodied Energy, MJ/kg 140
19
Embodied Water, L/kg 1040
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12
87
Strength to Weight: Bending, points 19
52
Thermal Diffusivity, mm2/s 42
13
Thermal Shock Resistance, points 5.5
79

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0.7 to 1.0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0
Iron (Fe), % 0 to 0.8
98 to 99
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0.2 to 0.6
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 9.3 to 10.7
0.1 to 0.3
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0